<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .c1{
            color: red;
        }
        li{
            background-color: blue;
        }




    </style>
</head>
<body>
    <h1 class="c1">hello</h1>
    <h2>hello</h2>
    <button>submit</button>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>
 
</body>
</html>